We produced an IPv4 Census Poster based on the work of of this paper. The center of the poster is a Hilbert Map visualization of the utilization of the address space according to our taxonomy. The IPv4 address space is rendered in two dimensions using a space-filling continuous fractal Hilbert curve of order 12. Each pixel in the full-resolution image represents a /24 block; cyan indicates used blocks, black unassigned blocks, and grey RFC special blocks. Routed unused blocks are blue and unrouted assigned blocks are purple. Individual components are described below.

This visualization shows the utilization of the IPv4 address
space according to our inference methodology, which combines data from
active and passive measurements. The IPv4 address space is rendered
in two dimensions using a space-filling continuous fractal Hilbert
curve of order 12. Each pixel in the full-resolution image represents
a /24 block (256 contiguous addresses).

Interactive visualization that compares per-country address space utilization
with population and GDP. The width of a country (and continent)
represents its relative size within a dataset. E.g., the top bar
shows the percentage that each country contributes to the global
population, with China (cn) contributing the most (1.36B, 18.9%). The
correlation between datasets can be observed by comparing bars. There
is not a strong correlation between population (top bar) and number of
used /24 blocks of a country; in large part due to high usage by the
USA. There is, however, a strong correlation between the GDP (2nd from
top) and number of used /24 blocks of a country (3rd bar). Not only
does the USA dominate /24 block usage, it also represents a
significant portion of both the routed unused and unrouted assigned
bars, with 49.8% and 67.5% respectively.

Unused Space Ratio:
Per-country percentage of unused space (routed unused + unrouted assigned) out
of the assigned. The U.S. is red in this map due to a few very large allocations
heavily unutilized, while some African countries are red because they use a very
small fraction of their (also small) assigned space.

# /24s in use:
Per-country absolute numbers of /24 blocks in use.

Per-country /24 block usage normalized by population: Shows the number of /24
blocks in use per 1M people.

Per-country /24 block usage normalized by Gross Domestic Product (GDP): Shows
the number of /24 blocks in use per US$1B of GDP.

Regional Internet Registries (RIRs) manage the allocation and assignment of internet resources. These two visualizations show 1) RIRs and their corresponding geographical locations, and 2) RIRs within the Hilbert Graph.